Thomas b



Nrrnn rates PATENT OFFICE.

THOMAS B. MERRILL, OF PORTLAND, MAINE, ASSIGNOR TO HIMSELF AND JAMES QUINN, OF SAME PLACE;

BOILER-BEARING.

SPECIFICATION forming part of Letters Patent No. 432,950, dated July 22, 1890.

Application filed December 4, 1889. Serial No. 332,562. (No model.)

To all whom it may concern: mitting the' body of the rolls to bear directly Be it known that I, THOMAS B. MERRILL, of on the bed-plate, so as not to lessen the sup- Portland, in the county of Cnmberland and porting power of said rolls. The ends of the State of Maine, have invented certain new Ways may have abutments j to linit the travel and useful Improvements in loiler-Bearings; of the rolls; but these should be sufficiently 55 and I do hereby declare that the following is distant to allow of the free travel of the lugs a full, clear, and exaet description of the inas far as the greatest expansion of the boiler Vention, which will enable others skilled in would require. If the rolls be placed upon the art to which it appertains to make and the bed-plate without the guideways, as aforeo use the same, reference being had to the acsaid, they soon get out of their true position, 6o companying drawings, and to letters of refwhich is paralle l with the direction of the erence marked thereon, which form a part of novement of the supported body and with this specilication. each other, those on the outside first and then My invention relates to improvements in others, wherebythefrietion is muehincreased, boiler-bearings and other bodies that are snband consequently the strain on the boiler-sup- 65 ject to alternate contraction and expansion, ports and masonry.

and especially to those cases where the boil- The operation of my improved bearing is er-supports rest on a seies of rolls. as follows: The lugs rest on the rolls, and as It consists in placing on a bed-plate firmly the boiler expands and contracts they move 'zo set in or on the masonry raised tracks paralback and forth, the rolls traveling on the 70 lel with each other and with the line of direcbed-plate beneath them lessening the frietion tion of the movement of the supported body and beingkept in their true relative positions and interposing between the lugs that supby the Ways, as set forth. If the Ways on the port the boiler and the bed-plate a series of bed-plate were placed close to the ends of the rolls having grooves or channels adapted to rolls and at right angles thereto, the rolls 75 receive the tracks on the bed-plate. would be kept in position much better than In the drawngs herewith aecompanying by the old way. and making a part of this application, Figure I am aware that boilers have been supported 1 is an isometric view showing boiler, lug, by lngs bolted to the sides thereof, said lugs plate, and rolls. Fig. 2 is a section of a roll resting on rolls placed upon a bed-plate, and 80 -and plate, and same letters refer to like parts. I do not elaim, broadly, rolls placed on a bed- In said drawings, a represents the boiler, b plate to serve as a bearing, but only the spethe lugs bolted to the boiler, and c the masonry cific for-ms hereinafter elaimed. upon which the whole is to rest. The num- Having thus described my invention and ber of lugs and bearings will of course vary, its use, what I claim, and desire to secure by 85 according to the size of the boiler. The base- Letters Patent of the United States, isplate may have on its under side projections The combination, with a boiler having supor flanges to aid in retaining said plate in porting-lugs attaehed thercto, of a bed-plate position by extending into the masonry, and resting on the fonndation and having raised on the upper face thereof are raised tracks parallel ways thereon and rolls having grooves 90 or guideways e. On these guideways is then therein to receive said ways, substantially as set a series of rolls f, having grooves g cut and for the purposes set forth. therein, so as to receive the Ways and permit In testimony that I claim the foregoing as the rolls to travel over them. The Ways exmy own I aitix my signature in presence of tending up into the groo\=*es keep the rolls in two witnesses.

proper position, the sides of the grooves prcss- Portland, Maine, November 30, 1380. ing against the sidcs of the Ways, unless the THOMAS B. MERRILL. rolls travel in. the sane direction. The \Vitnessesz grooves g are nade deep enough to prevent ELGIN C. VERRILL,

the rolls from resting on the Ways, thus perlVILLIAM II. LOWERY. 

